Question: which tributary has the highest watershed area?
Paraphrase: Which watershed tributary has the highest area?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q159675 . ?ent wdt:P2053 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Battle River, Lohit River, Qing River, Dibang River, Svislach River